linux-kernel - [PATCH] net/tls: getsockopt supports complete algorithm list

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Date:   Mon, 25 Oct 2021 21:05:00 +0800
From:   Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Boris Pismenny <borisp@...dia.com>,
        John Fastabend <john.fastabend@...il.com>,
        Daniel Borkmann <daniel@...earbox.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
Subject: [PATCH] net/tls: getsockopt supports complete algorithm list

AES_CCM_128 and CHACHA20_POLY1305 are already supported by tls,
similar to setsockopt, getsockopt also needs to support these
two algorithms.

Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
---
 net/tls/tls_main.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
index d44399efeac6..278192ee133e 100644
--- a/net/tls/tls_main.c
+++ b/net/tls/tls_main.c
@@ -421,6 +421,48 @@ static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval,
 			rc = -EFAULT;
 		break;
 	}
+	case TLS_CIPHER_AES_CCM_128: {
+		struct tls12_crypto_info_aes_ccm_128 *aes_ccm_128 =
+			container_of(crypto_info,
+				struct tls12_crypto_info_aes_ccm_128, info);
+
+		if (len != sizeof(*aes_ccm_128)) {
+			rc = -EINVAL;
+			goto out;
+		}
+		lock_sock(sk);
+		memcpy(aes_ccm_128->iv,
+		       cctx->iv + TLS_CIPHER_AES_CCM_128_SALT_SIZE,
+		       TLS_CIPHER_AES_CCM_128_IV_SIZE);
+		memcpy(aes_ccm_128->rec_seq, cctx->rec_seq,
+		       TLS_CIPHER_AES_CCM_128_REC_SEQ_SIZE);
+		release_sock(sk);
+		if (copy_to_user(optval, aes_ccm_128, sizeof(*aes_ccm_128)))
+			rc = -EFAULT;
+		break;
+	}
+	case TLS_CIPHER_CHACHA20_POLY1305: {
+		struct tls12_crypto_info_chacha20_poly1305 *chacha20_poly1305 =
+			container_of(crypto_info,
+				struct tls12_crypto_info_chacha20_poly1305,
+				info);
+
+		if (len != sizeof(*chacha20_poly1305)) {
+			rc = -EINVAL;
+			goto out;
+		}
+		lock_sock(sk);
+		memcpy(chacha20_poly1305->iv,
+		       cctx->iv + TLS_CIPHER_CHACHA20_POLY1305_SALT_SIZE,
+		       TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE);
+		memcpy(chacha20_poly1305->rec_seq, cctx->rec_seq,
+		       TLS_CIPHER_CHACHA20_POLY1305_REC_SEQ_SIZE);
+		release_sock(sk);
+		if (copy_to_user(optval, chacha20_poly1305,
+				sizeof(*chacha20_poly1305)))
+			rc = -EFAULT;
+		break;
+	}
 	case TLS_CIPHER_SM4_GCM: {
 		struct tls12_crypto_info_sm4_gcm *sm4_gcm_info =
 			container_of(crypto_info,
-- 
2.19.1.3.ge56e4f7